Remove ApplicationLauncher::Mode

The actual remaining use was to pop up a terminal in some
setups where Mode == Console, with a default of Gui meaning
"no console". In some downstream uses it was used set to
Console (probably to mean "this helper process does not need
a gui") but then luckily ignored when actually starting the
helper processes.

All cases where the console is useful and requested are
nowadays RunWorkers belonging to RunConfigurations with
a TerminalAspect, so they can directly get the relevant bit
from their RunConfiguration without having it part of
all StandardRunnables.

Change-Id: I1368d5968da5cf672656aebf200ccac8d45335d0
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/valgrind/callgrind/callgrindcontroller.cpp

@@ -128,7 +128,6 @@ void CallgrindController::run(Option option)
 
     Runnable controller = m_valgrindRunnable;
     controller.executable =  CALLGRIND_CONTROL_BINARY;
-    controller.runMode = ApplicationLauncher::Gui;
     controller.commandLineArguments = QString("%1 %2").arg(toOptionString(option)).arg(m_pid);
 
     if (!m_valgrindRunnable.device